Ubuntu is one of the most popular Linux distributions among home users. This system is derived from the Debian distribution that reigns on the servers and among the advanced users. Canonical is a company responsible for preparing the distribution, and they recently made a rather important decision. The next version of this distribution will not be distributed with installation images (in practice, this is the LiveCD image with the installation option) for processors in today’s outdated 32-bit architecture.
The reason for this decision is quite simple. It turns out that the manufacturer is no longer going to test the 32-bit version of the installer, because it is quite cumbersome and does not bring much benefit. Canonical can no longer test its operating system on i386 hardware because it is no longer available. Also, users themselves are not too keen on the 32-bit version of Ubuntu. Statistics show that few people are currently downloading i386 installers. Almost everyone decides to download and install a 64 bit version. What does this really mean?
Canonical does not completely abandon the 32-bit version of Ubuntu 17.10
Announcing on the mailing group decision only means that the ubuntu-desktop-i386.iso images disappear from the repository. However, this decision has no effect on repos of deb packages, mini.iso images, and upgrade paths. Canonical will continue to support 32-bit versions of LiveCDs for older Ubuntu releases and their updates to Ubuntu 17.10. So, if you are using 32-bit version of Ubuntu, you do not have to worry about anything. You will calmly upgrade your distribution to version 17.10. On the other hand, if someone needs to install a 32-bit version of Ubuntu 17.10, it will do so using the mini.iso installer. So far, there are not too many changes, but most likely it will change.
Canonical can test 32-bit versions of its operating systems on 64-bit computers. Such backward compatibility is supported by Intel and AMD processors. However, abandoning the 32-bit version of the LiveCD may mean that Ubuntu will completely abandon support for the old architecture. However, they will still support 32-bit applications on 64-bit systems. Currently, there are no major problems with that, but users are afraid of such drastic changes.